Here is the first update of Mark’s Wolffpac exclusive on Zack Johnathan. Mark flew to Miami to shoot him, as well as some other hot new muscle and athletic models on South Beach. Zack was in perfect shape for this shoot, and Mark’s new 10 mega pixel camera captures every inch. From his rock hard pecs and abs, right down to his stiff cock and smooth athletic ass. Check out the huge gallery added to the site’s fitness model section.